Multiple fuse



March 2-2, 1932. L, 5, O'NElL 1,850,685

MULTIPLE FUSE Filed April 29. 1929 Av d8 6,0

IIYVENTOR. L60 5. 0%.

ATTORNEY Patented Mar. 22, 1932 UNITED STATES LEO S. ONEIL, F DETROIT,MICHIGAN MULTIPLE FUSE Application filed April 29,

My invention relates toa new and useful improvement in a multiple fuseand has for its object the provision of a fuse which will be simple instructure, economical of manufacture, durable and efficient in use andso arranged that it may be used to carry a plurality of fuses which maybe easily and quickly placed in operative position.

Another object of the invention is the provision of a multiple fusewherein a removable cap will serve to support the fuses in position.

Another object of the invention is the provision in a multiple fuse of aremovable cap carrying a plurality of fuses and provided with resilientmeans for maintaining a close contact when the device is in use.

Other objects will appear hereinafter.

The invention consists in the combination and arrangement of partshereinafter described and claimed.

The invention will be best understood by a reference to the accompanyingdrawings which form a part of this specification and in which,

Fig. 1 is a side elevational view of the invention.

Fig. 2 is a central longitudinal sectional view of the inventionenlarged.

Fig. 3 is a View taken on line 83 of Fig. 2.

Fig. 4 is a view taken on line H of Fig. 2.

Fig. 5 is a fragmentary sectional view through one of the contacts.

As shown in the drawings, the invention comprises a plug 7 made fromsuitable insulating material and provided on the periphery of itsthreaded portion with a metallic casing 8 which may be threaded into anelectric socket in the usual manner. A metallic stem 9 extends centrallythrough the plug 7 and is provided with a contact head 10.

An electric conductor 11 extends in the plug 7 and is electricallyconnected to the casing 8 and also to a contact 12 which is embedded inthe plug 7 and exposed at the upper face thereof. A removable cap 13 isprovided for the plug and provided with the flange 1% which embraces theperiphery of the outer end of the plug. The inner face of the cover 13is recessed as at 15. Secured in this cover 1929. Serial No. 358,810.

are a plurality of contacts 16, each of which is slitted, as at 16, andinto which may be pressed one end of the fusestrip 17 which has itscentral portion 18 reduced in area so that when an overload is receivedand the fuse blows, it will blow at the reduced portion 18. The oppositeend of this fuse strip is inserted in a slit formed in a collar 19.Threaded on the upper end of the stem 9 is a knob 20 of insulatingmaterial, a sleeve 21 serving as a spacer to retain the knob 20 spacedfrom the cover 13. The stem 9 projects loosely through the cover 13 asit does also through the collar 19. A coil spring 22 is positioned inthe sleeve 21 in embracing g relation to the stem 9 and serves to retainthe cover 13 pressed tightly against the plug 7 so that the contact 16,which may be in alignment with the contact 12, will always be pressedthere-against.

The construction is such that the cover 13 may be rotated on the plug 7so as to bring the several contacts singly into alignment and contactwith the contact 12. Consequently, it is evident that when one of thefuse strips blows a rotation of the cover 13 to bring the nextsucceeding contact 16 into engagement with the contact 12 will providean operative fuse. In this way, the fuse may be renewed a number oftimes without necessitating its 0 removal from the socket in which it ismounted. lVhen all of the fuse strips have been used, the same may beremoved by removing the cover 13 and replacing the fuse strips or thecover and fuse strips may be made as a 35 unit so that the cover wouldbe replaced when the fuse strips have been used.

While I have illustrated and described the preferred form of myinvention, I do not wish to limit myself to the precise details ofstruce0 ture shown but desire to avail myself of such variations andmodifications as come within the scope of the appended claim.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

A multiple fuse of the class described comprising: a plug; a metallicportion threaded on the periphery of one end of said plug, said plugbeing threadable into a socket at said portion; a contact mounted in theface of saidplug at the opposite end; means for electrically connectingsaid contact to said metallic portion; a stem projected axially throughsaid plug; a head mounted on one end of said stem; a cover for saidplug, said cover being rotatable thereon and said stein projectingcentrally there-throughya collar rotatably mounted on said stem, saidcollar having a 10 plurality of slits formed therein; a plural- V ity ofseparate contact members mounted on said cover, each provided With aslit formed 7 therein, and each being adapted individually for engagingthe contact insaid plug upon rotation of said cover; a plurality of fusestrips each. engaging at its opposite ends in a slitformed in saidcollarand in a slit formed intone of said contacts in said cover. I

Liitestimony whereof I have signed th foregoing specification. i

V LEO S. 'ONEIL.

